*While Fitbit devices are water resistant, it’s not good to keep a wet band on your skin for long periods of time, so we don't recommend showering with our products. If your band does get wet, rinse and dry it (and your skin) thoroughly before putting it back on your wrist.

Specifications

Sizing

SMALL*

140 - 176 mm

LARGE*

161 - 209 mm

WIDTH

13.99 mm

What's included

Charging Cable

Wireless Syncing dongle

Sensors and componenets

GPS

3-axis accelerometers

3-axis gyroscope

Digital compass

Optical heart rate monitor

Altimeter

Ambient light sensor

Vibration motor

Environmental requirements

Water resistance

Water-resistant to 5 ATM

Operating temperature

-4° to 113° F

Max operating altitude

30,000 feet

Battery and Power

We recommend charging your Surge every few days to ensure you are always tracking.

Battery life: lasts up to 7 days

Battery type: Lithium-polymer

Charge time: One to two hours

Radio transceiver: Bluetooth 4.0

Care

Clean your band and wrist regularly with a soap free cleanser. If it gets wet, remove and dry thoroughly. Leave enough room for a finger to fit between the band and your wrist. Learn more.

*While Fitbit devices are water resistant, it’s not good to keep a wet band on your skin for long periods of time, so we don't recommend showering with our products. If your band does get wet, rinse and dry it (and your skin) thoroughly before putting it back on your wrist.

Memory

Tracks 7 days of detailed motion data – minute by minute.

Tracks daily totals for past 30 days

Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times

Sample rate for GPS is 1 Hz

Materials

Surge’s wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Surge also has a surgical- grade stainless steel buckle.